Plug assembly



FIG. 1 is a top plan view of a plug assembly, showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a front elevation view thereof; and,

FIG. 7 is a perspective view thereof.

The broken line showing of the environment is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a plug assembly, as shown and described. 